3:49 【プロセカ】ECHO(full ver.)／東雲彰人(Shinonome Akito)×白石杏(Shiraishi An)｜Project Sekai｜Color Coded Lyrics 1:39 ECHO - Akito and An Ver Lyrics 3:52 ECHO / Vivid BAD SQUAD × 巡音ルカ 1:37 [PROJECT SEKAI] ECHO - AKITO & AN VER. (COLOR CODED LYRICS) 1:48 Project Sekai | ECHO - Akito & An Cover (Hard) - Full Combo 3:47 [FULL VER] ECHO An 白石 杏 + Akito 東雲 彰人 Alternate Vocal 0:27 akito speak english🗣️🇺🇸 3:49 [FULL] ECHO-An Shiraishi & Akito Shinonome Alt Vocal Cover 1:44 ECHO / Vivid BAD SQUAD × 巡音ルカ【3DMV】 3:50 [FULL VER] Aoyagi Toya x Azusawa Kohane - ECHO [alt vocal] | Color Coded Lyrics | Project SEKAI 2:29 [Proseka] Alter Ego An & Akito Vocal Mix (KAN/ROM/ENG lyrics) 3:50 [FULL VERSION] (ECHO) | Shinonome Akito & Shiraishi An Alt Cover | Project SEKAI / プロセカ 1:39 【 Vietsub 】Echo ver『 Akito + An 』- Vivid BAD SQUAD《 Project Sekai 》 1:37 [project sekai] ECHO but what the hell’s going on with akitos neck? 3:54 🎼 ECHO (エコー) AKITO EN | PJSK: MUTED VOICES